I am replacing the old attic fan motor with a slightly less used one
from another house. The motor is a a two speed motor, but this house
is only a one speed wiring and switch.
After installing it, using only the high speed terminal, the fan is
going in the wrong direction. I tried reversing the wires in the box
to see if that'd reverse the direction but no joy.
Does this indicate that this motor cannot reverse direction?
There are reversible fan motors. I used to have a 21" box fan that
had one. Don't know how common they are, or in this size.
But it would have an extra wire. And there is an extra wire, but you
think that is for the other speed. If you're not positive, it
wouldn't take long to connect it instead and find out.
Strangely, that wouldn't change anything, but turning the whole motor
over would. Would it be safe to run that way? You'd probably have to
build a bigger shield and screen.
If it has a capacitor to start/run then yes it can be reversed. But you
have to know what you are doing. Find an electrician/AC friend to do it
for you, or take the motor to a rebuilding service. They should do it
for a coupla bucks. It only involves moving a spade lug over.
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